Hi Jim, On the point of how to test what will happen to you if you change to 2 spindles from 6 spindles.... <<<< Putting on Regional User Group Promoter (read President hehehe) Hat) >>> Contact the Local RUG and find a site with that hardware config and go talk with them! Compare running programs that both sites have up and running... maybe a store of the PUB.SYS group? Just a thot :) Art "Yes, I do giggle a lot! heheheh " Bahrs +-------------------------------------------+------------------------------+ | Oregon Health Sciences Foundation |The views here are no one's, | | Art Bahrs, Manager of Information Services| least of all, mine! | | President, HP Oregon Regional Users Group (ORERUG) | +-------------------------------------------+------------------------------+ | And the men who hold high places must be the ones to start. | +--------------------------------------------------------------------------+ | [log in to unmask] 'The Professor' Work: (503) 220-8333 Fax: (503) 228-9588 | +--------------------------------------------------------------------------+ >>> Therm-O-Link <[log in to unmask]> 02/27/97 10:55am >>> Here's our current disk layout: 4 2203A 670MB drives, SYSGEN paths: 4.1.0, 4.1.1, 4.5.2, 4.1.2 2 7937H 571MB drives, SYSGEN paths: 4.1.4, 4.1.5 Roughly 3.8 GB, all in the <long_name> volume set on a Series 948. We are contemplating (very seriously) going to a series 918 with two disk drives, a 2GB and a 4GB. We have a 40-user license and do not exceed 32 sessions at any time. We will probably (over the next year or two) add another 20 sessions, but the total session count will not exceed 64. We have most of our users accessing one application, with two or three others accessing a second application. My nebulous-question-of-the-week is: Will we see any disk access time degradation by going from six spindles down to two or will the newer drives be quicker? If the answer to this is the infamous "It depends", how can I determine for sure what the answer will be for us? Thanks in advance. Jim Phillips Manager of Information Systems E-Mail: [log in to unmask] Therm-O-Link, Inc. Phone: (330) 527-2124 P. O. Box 285 Fax: (330) 527-2123 Garrettsville, Ohio 44231